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A silicate which gelatinizes on treatment with acids should be mixed first with a little water, and the strong acid added in small portions with stirring, otherwise the gelatinous silicic acid incloses particles of the original silicate and prevents decomposition. The water, by separating the particles and slightly lessening the rapidity of action, prevents this difficulty.
The second class is that of Jelly-Fishes or Acalephs; and here the same plan is carried out in the form of a hemispherical gelatinous disk, the digestive cavity being hollowed, or, as it were, scooped, out of the substance of the body, which is traversed by tubes that radiate from the centre to the periphery.
That placid, yielding way of hers, that habit of mind which he had regarded in his mannish fashion as being altogether gelatinous and invertebrate how ill he had construed it all. What a depth of feeling lay concealed beneath it!
"Those who have studied the subject say that it is caused by the presence of myriads of minute marine organisms, some soft and gelatinous, and others such as the Crustacea of a hard nature; but, in reality, under some conditions of the atmosphere all sorts of marine creatures, like those huge medusae, shine both in the water and out of it." This appearance continued many hours.
The crustaceans live within their shells or take advantage of ready-made refuges of limestone, expelling their former owners; the animal-plants exhale toxins; the planctonic beings, transparent and gelatinous, burn like a crystal exposed to fire; some organisms apparently weak and flabby, have in their tails the force of a carpenter's bit, perforating the rock sufficiently to create a cavern of refuge in its hard interior.... And the timid mollusks, trembling and succulent pulp, have fabricated for their protection the strong shields of their valves, two concave walls that on opening form their door, and on closing, their house.
The minute species mere gelatinous specks swarm at times by countless myriads in the waters of the ocean, and make its surface glow with 'vitalised fire. The waves, as they curl and break, sparkle and flash forth light, and the track of the moving ship is marked by a lustrous line.
Brandt, of Berlin, although failing to confirm Haeckel's observations as to the presence of starch, has completely corroborated the main discovery of Cienkowski, since he finds the yellow cells to survive for no less than two months after the death of the Radiolarian, and even to continue to live in the gelatinous investment from which the protoplasm had long departed in the form of swarm-spores.
Breadth at mouth of wide extremity 0.08 inch. We have several times caught a triangular, transparent, gelatinous animal; it is 0.18 inch in thickness, and in the outer pulpy gelatinous mass there is an interior sac, and strong muscular bands are marked across this.
If some of the gelatinous parts of meat be added, the broth is then of a rich and nutritious quality, and can be made very cheap.
Whether stony, like the Corals, or soft, like the Sea-Anemone, or gelatinous and transparent, like the Jelly-Fish, or hard and brittle, like the Sea-Urchins, whether round or oblong or cylindrical or stellate, in all, the internal structure obeys this law of radiation. Not only is this true in a general way, but the comparison may be traced in all the details.
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